Electric brake.



N0. 683,60l. PfiIBIIfBd 0012.1, |90L E; A. HENRY.

ELECTRIC BRAKE. (Application filed Sept. 17, 1960.

(No Model.)

Inventor Witnesses f hw n4: mums warns co. Photo-Luna. WASHINGTON, n. c.

UNITED STATES PATENT omen.

EDlVARD A. HENRY, OF CRESTLINE, KANSAS.

ELECTRIC BRAKE.

SPECIFICATIUN forming part Of Letters Patent N 0. 683,601, dated October 1, 1901. Application filed September 17, 1900. Serial No. 30,309. (No model.)

To all whom it may concern:

Be it known that I, EDWARD A. HENRY, a citizen of the United States, and a resident of Grestline, in the county of Cherokee and State of Kansas, have invented a new and Improved Electric Brake, of which the following is a full, clear, and exact description.

This invention relates to improvements in electric brakes particularly adapted for use on street-cars electrically driven.

The object of my invention is to provide a brake easily controlled, of simple construction, and powerful enough to completely control a car.

I will describe an electric brake embodying my invention and point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 shows a bottom view of car with brake in position; Fig. 2, an elevation of car, showing section of truck and brake; Fig. 8, a sectional view of magnets and controller.

Referring now to said drawings, 1 is a softiron armature. The armature is connected with and held in position by shaft 8. This shaft is mounted and adapted to slide horizontally backward and forward in a support '7, bolted to car-frame. To this shaft is connected evener 9. This evener is designed to draw up brake-rods 10, beams 11 11, and shoes 12 12 12 12. Shaft 8, however, may be attached to any system of brake equipment.

The armature 1 is attracted by a series of electromagnets 2, 3, and 4, mounted on a shaft 24, which shaft is supported by brackets 5 and 6. Said shaft has shoulders or abutments 22 23. The object of these shoulders or stops is to allow the magnets to pass onlya certain distance toward the armature. The magnetcores are made hollow, and consist of single castings having flanges provided to give a large polar or attracting surface and also to hold the windings in position.

The brake is governed by a controller consisting of a number of contact-points 19 2O 21, corresponding to the number of magnets mounted on the shaft. A metallic block 18, adapted to be rotated by handle 17, is designed to pass over contact-plate 16. This block is of suflicient length to connect two of the contact-points.

The brake is operated as follows: When the brake is not applied, the handle 17 (shown on the left side, Fig. 8) stands in a position to the extreme right, the block 18 not being in circuit with plug 19. To apply the brake, the operator moves the handle to the left, closing the circuit between points 19 and. 18. The current entering from the positive conductor 30 energizes magnet 2 and passes through conductor 25 to contaot-pointl9, and throughconductor 18 to return-conductor 31. Magnet 2 attracts the armature 1. The op erator then moves the connector 18 t0 the next contact point. The connector being long enough holds the contact-point 19in cir-' cuit until contact-point 20 is placed in circuit. The circuit is broken between points 19 and 18. The current passes from 25 through wire 26 into the coils of magnet 3, energizing itandattractingmagnet2andarmaturel. In a similar manner the contact-point 21 is placed in circuit. The current then passes from wire 27 into 28 and through the coils of magnet 4, passing off on conductor 29. While the current passes through the coils of all the said magnets, armature 1 is attracted to and held by magnet 2. Coil 2 and said armature are attracted toward and held by coil 3. In a similar manner armature 1 and coils 2 and 3 are-drawn toward and held by coil 4, coil 4 being held rigid on shaft 24. To release the brake, the handle is reversed or moved back to its original position, cutting out successively coils 4 3 2. As coils 4 and 3 are cut out of the circuit and no longer energized, the retraction of brake-springs 32 32 causes the coil 2 to assume its original position, as shown in Fig. l. The coil 2 still being in circuit attracts coil 3 backto its original position. As coil 2 is switched out of circuit the armature, being no longer attracted, assumes its former position.

I claim as my invention-- 1. In an electric brake a series of electro magnets, mounted on a shaft having a head and shoulders provided to allow the passage of electromagnets in one direction, but not another, as specified.

2. In an electric brake a series of electromagnets mounted on a shaft,the several magnets capable of independent action, said shaft having stops or shoulders provided to prevent the passage of said magnets but a certain distance toward an armature. I

3. In an electric brake consisting of a num- 'ber of electromagnets mounted on a shaft, "said shaft and magnets having means proing adapted to be attracted to a magnet held rigid on said shaft, the said magnets being provided with wide flanges or polar faces to give a large attracting-surface.

4. In an electric brake a series of electromagnets mounted on a shaft and having means provided to prevent the passage of said i magnets but a certaindistance toward an armature said armature and magnets being adapted to be drawn toward a magnet held stationary; said magnets having wide flanges to give a large polar or attracting surface.

5. In an electric brake having a series of electromagnets mounted on a shaft having stops or shoulders to prevent the passage of the said magnets nearer than a desired distance toward an armature, a controller consisting of a number of contact-points corre sponding to the number of magnets and a block adapted to be rotated by a handle, so constructed as to place one, two, or three coils in circuit without interrupting or breaking the circuit. h

EDWARD A. HENRY.

Witnesses:

LAURA M. HAMILTON,

' M. L. MoGINNIs. 

